motherboard chassis_fan3 not able to control speed with 3pin fan?

eddie500

Gawd
Joined
Jan 23, 2003
Messages
984
Just to start off I believe the motherboard is probably broken.

All other motherboard fan controllers work fine.

The chassis_fan3 port on motherboard, works only with 3 pin at full speed and can't adjust the speed.

If I plug a 4 pin fan into the chassis_fan3, it works and I can control speed.

Should I just assume the chassis_fan3 is broken and not able to adjust its voltage?

Thanks.
 
look in the bios under advance for the fan control and set it to DC mode instead of pwn, if you can. some new boards have gone totally pwm.
 
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